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December 18, 2019 Service bulletin

Information Only

Kenworth technical service bulletin 03-071 for 2011-2020 Kenworth T680, 2011-2016 Peterbilt 379 and 2011-2020 Peterbilt 579 and others.

Bulletin number
03-071
Component
Electrical system: software
Summary
Information Only - Vehicles built with NAMUX software from 2013 to present may experience accuracy issues with the tachometer. The issue can be temporarily resolved using any one of the included procedures.

Owners of these vehicles have filed 30 complaints in the electrical category.

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